Product Description

Cold-rolled sheet is a steel product made of hot-rolled coils and processed through multiple rolling processes at room temperature. The surface of cold-rolled sheet is flat and smooth, showing a uniform metallic luster. According to different subsequent processing processes, cold-rolled sheet can be divided into ordinary cold-rolled sheet, galvanized cold-rolled sheet, color-coated cold-rolled sheet, etc.; according to the material, it can be divided into low-carbon cold-rolled sheet, medium-carbon cold-rolled sheet and high-carbon cold-rolled sheet, etc.

Parameter

Application description:

Automobile manufacturing: It is an important material in the field of automobile manufacturing and is widely used in body panels (such as doors, hoods, roofs), frames, chassis parts, etc. Its high-precision dimensions and good forming performance can meet the processing requirements of complex automotive parts, while ensuring the strength and safety of the body and reducing the weight of the car.

Home appliance manufacturing: In the home appliance industry, cold-rolled sheets are used to produce the outer shells and internal structural parts of home appliances such as refrigerators, air conditioners, washing machines, microwave ovens, and televisions.

Electronic equipment: Suitable for manufacturing electronic equipment components such as computer cases, mobile phone cases, and tablet computer cases.

Architectural decoration: In the field of architectural decoration, cold-rolled sheets can be used to make various decorative panels, keels, door and window frames, etc. .

Hardware products: Commonly used in the production of various hardware tools, furniture accessories (such as drawer slides, hinges), shelves, office desks and chairs, etc.

performance

High dimensional accuracy: The cold rolling process can control the thickness tolerance of the cold-rolled plate within a small range through precise rolling equipment and process control, and the width and length dimensions are also more accurate, providing a reliable foundation for subsequent processing and manufacturing.

About Cold Rolled Sheet for Automobile

In the field of automobile manufacturing, cold-rolled sheet has become an indispensable key material with its excellent performance.

1. Application parts

Body covering parts: The exterior covering parts of the car, such as doors, hoods, roofs, and trunk lids, are all made of cold-rolled sheets.

Frame and chassis parts: As the skeleton of the car, the frame bears various loads during the driving process of the vehicle. Cold-rolled sheets are used to manufacture key parts such as frame longitudinal beams and cross beams to ensure the strength and rigidity of the frame;

Interior and structural parts: Structural parts such as instrument panel brackets and seat frames in the interior of the car, as well as some decorative parts, also use cold-rolled sheets. This

2. Performance requirements

High strength and lightweight: Cold-rolled sheets reduce their own weight while ensuring high strength by optimizing chemical composition and processing technology. For example, cold-rolled sheets made of high-strength low-alloy steel (HSLA) have a yield strength of 300-500MPa.

Good formability: The shapes of automotive parts are complex, and cold-rolled sheets are required to have excellent formability to meet the requirements of processing technologies such as stamping and bending.

Excellent surface quality: The surface quality requirements of the body panels are extremely high. The surface of the cold-rolled plate must be flat and smooth, without scratches, pits, roller marks and other defects to ensure the subsequent coating effect. Cold-rolled plates with advanced surface quality (FD grade) can meet the high gloss and color uniformity requirements of the car's appearance and improve the appearance quality of the car. ​

Fatigue resistance and corrosion resistance: During the driving process of the car, the parts will be subject to frequent vibration and impact. Cold-rolled plates need to have good fatigue resistance to prevent fatigue cracks during long-term use;

CRC Commonly used materials

Low-carbon cold-rolled plate: low carbon content, good plasticity and weldability, easy to process and form, suitable for manufacturing body panels and interior structural parts with high requirements for formability.

High-strength low-alloy steel cold-rolled plate (HSLA): Add a small amount of alloy elements (such as manganese, niobium, titanium, etc.) on the basis of low-carbon steel to significantly improve the strength and toughness of the steel plate.

Dual-phase steel cold-rolled sheet (DP steel): It has a dual-phase structure of ferrite and martensite, high strength, good plasticity, and a high strain hardening index. It is often used to manufacture safety components such as bumpers and anti-collision beams of automobiles. ​

Bake-hardened steel cold-rolled sheet (BH steel): After painting and baking, the yield strength will be further improved. It has good formability and anti-sag performance. It is suitable for manufacturing body panels and can effectively improve the flatness and durability of the car's appearance.

Shipping Packaging

For Cold Steel products, we have three layers of waterproof packaging.
1. Waterproof thick plastic paper is used inside to prevent water ingress.
2. The second layer is packed with thick kraft paper, which is waterproof and prevents surface scratches, further enhancing the anti-rust effect.
3. Thick iron sheet packaging is used outside, which not only protects the steel coils in depth, but also plays a wear-resistant role. We use special full-wrapped corner guards for the corners. It can effectively prevent the steel coils from being collided and damaged during transportation and loading and unloading.